World Legacy's Nightmare is a Field Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, World Legacy's Nightmare is Unlimited.
YGOPRODeck lists World Legacy's Nightmare for these formats: Common Charity, TCG, OCG, Master Duel.
World Legacy's Nightmare belongs to the Knightmare archetype—use that tag when searching for engine pieces and tech options.
A listed print of World Legacy's Nightmare appears in 2019 Gold Sarcophagus Tin Mega Pack (MP19-EN039) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for World Legacy's Nightmare is about $0.03 on Cardmarket (prices change frequently).
